Lathe-apron.



. PATENTED MAY 23, 1905.

N. D. CHARD.

LATHE Amon.

APPLICATION FILED JUNE 17,1904.

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@Q /MMM PATENTED MAY 23, 1905.

N. D. ICHARD. LATHE APRON.

APPLIGATION FILED JUNE 17,1904.

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Immun QQMWJ NTTED STATES i Patented May 23, 1905.

PATENT Frrcn.

NICHOLAS D. CHARD, OF CINCINNATI, OHIO, ASSIGNOR TO TI-IE LODGE &

SHIPLEY MACHINE TOOL COMPANY, OF CINCINNATI, OHIO, A CORPO- RATION.

LATHE-APRON.

SPECIFICATION forming' pari', 0f Letters Patent NO. 790,872, dted May 23, 1905.

Application filed June 17, 1904- Selial. N0. 213,029.

To all whom, it Wfl/my 007/0067177,.-

Be it known that I, NICHOLAS D. CHARD, a citizen of the United States, residing at Cincinnati, in the county ofHamilton and State of Ohio, have invented certain new and useful Improvements in Lathe-Aprons, of which the following is a specification.

My invention relates to an apron-feed of an engine-lathe.

One of the objects of the invention is to get a variety of feeds in the apron of an enginelathe of such organization as to occupy but little space, being actuated by a single lever and not interfering with or displacing to any material degree the conventional feed organization of the apron mechanism.

The features of my invention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which-- Figure 1 is a side elevation indicating in dotted lines the plan of gearing. Fig. 2 is a central vertical section through the feedchanging gearing shown in dotted lines at the right-hand side of Fig. 1. Fig. 3 is a section on line Fig. 1. Fig. 4 is a-section on line w w, Fig. 3. Fig. 5 is a central vertical section through the feed-reversing gearing and mechanism secured to the rear of the apron. Fig. 6 is a section on line o o, Fig. 5.

1 represents the carriage; 3, the apron; 2, the feed-shaft, driven from the head-stock and passing between the apron and bed in the usual manner.

4 represents a sleeve loosely journaled concentrically to the feed-shaft 2. This sleeve carries the right and left hand bevel-gears 5 6.

7 represents the intermediate bevel-gear, the sleeve 4 being shiftable in opposite directions, whereby gear-Wheel 7 is driven from either gear-wheel 5 or 6 in opposite directions, the gear-wheels 5 and 6 being formed integral with the sleeve 4 and the whole being slidable in order to bring the gears 5 and 6 into mesh with gear 7 to effect a forward or reverse rotation of gear 7 The shifting of the gears 5 and 6, with their sleeve, is accomplished as follows:

- 42 represents a bearing secu red to the apron, forming a journal-bracket for the sleeve 4 and having the depending ears 43 44, in which the slide or shifting rod 45 is supported. This rod is provided with teeth adapted to mesh with the teeth of the segment 46, said segment 46 being keyed or fixed to the rock-shaft 40.

41 represents a crank fixed to the rock-shaft upon the outside of the apron. To the free end of the rod is fixed a yoke 47, engaged into a groove 48 of the sleeve 4. Thus as the crank 41 is manipulated it will impart motion to the shaft 40 and segment 41, causing thek rod 45 to be slid to the right or left, as the case may be, thereby throwing gears 5 and 6 into and out of mesh with gear 7.

Gear-wheel 7 has fixed to it pinion 8, from which extends the train of gear-wheels 9 10 11 12 in the order named for feeding the apron in the usual manner through rack-and-pinion mechanism in the usual way.

This invention concerns itself with the transmission of different feeds from the shaft 2 to the sleeve 4, and it comprises the following organization:

13 represents a bearing sleeve loose on shaft 2.

14 represents a sleeve journaled on the bearing-sleeve 13 and splined to the sleeve 4 so that the sleeve 4 may slide on but turn with Sleeve 14. Sleeve 14 has fixed or formed on its rear end the gear-wheel 15.

16 represents a sleeve splined on shaft 2 so as to slide thereon and turn therewith. Upon sleeve 16 is formed the pinion 17 and is keyed to the larger-diameter gear-wheel 18.

Formed on the opposing faces of the gearwheels 15 and 18 are the cooperating clutch members 19 20, and when these are in engagement, which is effected by shifting the sleeve 16 toward the gear-wheel 15, the shaft 2 directly drives the sleeve 4.

21 represents a short stud-shaft suitably supported in the apron.

'keyed the sleeve 22, to which are fixed the gear-wheels 23 24, while 25 represents an intermediate pinion formed on sleeve 22. It is obvious that if the sleeve 16 be shifted until Upon this shaft is the gear-wheels 18 and 25 are intermeshed the clutches 19 and 20 will be disengaged and shaft 2 will drive the sleeve 4 through the gear-wheels 18, 25, 24, and 15. If sleeve 16 be further shifted to intermesh gear-wheels 17 and 23, the sleeve 4 will be driven from the shaft 2 through the train of gear-wheels 17, 23, 24, and 15.

In order to conveniently shift the sleeve 16, I provide the following devices: Supported in the apron parallel with the shaft 2 is a rod 26, on Which is slidably mounted the sleeve 27. Sleeve 27 has a laterally-extended fork 28, which straddles the gear-wheel 18, so that the sleeve 16 may be slid in unison with the sleeve 27.

29 represents a rock-shaft journaled in the apron, having within the apron the rock-arm 30, engaging the yoke 31 of the sleeve 27 upon the outside of the apron. The extended end of the rock-shaft 29 is provided with an operating-handle 32, the outer end of which is provided with a pin 33, engaging into orifices or indents 34 in the apron corresponding to the three positions of adjustment of the sleeve 16.

Having described my invention, I claim- In combination with the apron of an enginelathe, a parallel feed-shaft and stud-shaft, a

driving-gear loose on the feed-shaft, a pair of different diameter gear wheels adapted to slide on and turn with the feed-shaft, clutch members between the meeting faces of the driving gear-wheel and the adjacent sliding gear-wheel, a fixed gear-wheel on the studshaft intermeshed with the loosed riving gearwheel on the feed-shaft, a pair of liXed gears of differentdiameter on the stud-shaft adapted to be intermeshed with the sliding gears on the feed-shaft, a rod within the apron parallel with the feed-shaft, a sleeve slidable thereon, said sleeve having a yoke-arm engaging the sliding gears on the feed-shaft, a rockshaft journaled through the apron, an arm on the shaft within the apron engaging the sleeve for shifting the same on the rod, a crank-han? dle on the outer end of the shaft, locking mechanism between the said apron and handle, a carriage to which said apron is secured, and a train of gears journaled upon the apron in driven connection with said driving-gear for traversing the carriage, substantially as described.

In testimony whereof I have hereunto set my hand.

NICHOLAS D. CHARD.

Witnesses:

OLIVER B. KAISER, LEO ODONNELL. 

